Above, thickness of the Earth's crust across Antarctica . Thicker crust appears red. The location of the Wilkes Land crater is circled (below right of center). Image courtesy of Ohio State University.

Above, GRACE-measured gravity fluctuations beneath East Antarctica . Denser regions appear more red; the location of the Wilkes Land crater is circled (above center). Image courtesy of Ohio State University.

Above, airborne radar image of land elevation in East Antarctica . Higher elevations appear red, purple, and white; the location of the Wilkes Land crater is circled (above center). Image courtesy of Ohio State University . An inset of the Chicxulub crater is included for comparison. Image courtesy of Ohio State University.

At left, combined image of gravity fluctuations and airborne radar in the Wilkes Land region of East Antarctica . The edges of the crater are colored red and blue; a concentration of mantle material is colored orange (center). Image courtesy of Ohio State University.

Below, size comparison of large craters of the solar system. The Wilkes Land crater is third from left. Image courtesy of Ohio State University. [Larger version available here.]